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0001 // SPDX-License-Identifier: GPL-2.0 OR MIT
0002 /**************************************************************************
0003  *
0004  * Copyright 2009-2014 VMware, Inc., Palo Alto, CA., USA
0005  *
0006  * Permission is hereby granted, free of charge, to any person obtaining a
0007  * copy of this software and associated documentation files (the
0008  * "Software"), to deal in the Software without restriction, including
0009  * without limitation the rights to use, copy, modify, merge, publish,
0010  * distribute, sub license, and/or sell copies of the Software, and to
0011  * permit persons to whom the Software is furnished to do so, subject to
0012  * the following conditions:
0013  *
0014  * The above copyright notice and this permission notice (including the
0015  * next paragraph) shall be included in all copies or substantial portions
0016  * of the Software.
0017  *
0018  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0019  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0020  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
0021  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
0022  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
0023  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
0024  * USE OR OTHER DEALINGS IN THE SOFTWARE.
0025  *
0026  **************************************************************************/
0027 
0028 #include <drm/ttm/ttm_placement.h>
0029 
0030 #include "device_include/svga_overlay.h"
0031 #include "device_include/svga_escape.h"
0032 
0033 #include "vmwgfx_drv.h"
0034 
0035 #define VMW_MAX_NUM_STREAMS 1
0036 #define VMW_OVERLAY_CAP_MASK (SVGA_FIFO_CAP_VIDEO | SVGA_FIFO_CAP_ESCAPE)
0037 
0038 struct vmw_stream {
0039     struct vmw_buffer_object *buf;
0040     bool claimed;
0041     bool paused;
0042     struct drm_vmw_control_stream_arg saved;
0043 };
0044 
0045 /*
0046  * Overlay control
0047  */
0048 struct vmw_overlay {
0049     /*
0050      * Each stream is a single overlay. In Xv these are called ports.
0051      */
0052     struct mutex mutex;
0053     struct vmw_stream stream[VMW_MAX_NUM_STREAMS];
0054 };
0055 
0056 static inline struct vmw_overlay *vmw_overlay(struct drm_device *dev)
0057 {
0058     struct vmw_private *dev_priv = vmw_priv(dev);
0059     return dev_priv ? dev_priv->overlay_priv : NULL;
0060 }
0061 
0062 struct vmw_escape_header {
0063     uint32_t cmd;
0064     SVGAFifoCmdEscape body;
0065 };
0066 
0067 struct vmw_escape_video_flush {
0068     struct vmw_escape_header escape;
0069     SVGAEscapeVideoFlush flush;
0070 };
0071 
0072 static inline void fill_escape(struct vmw_escape_header *header,
0073                    uint32_t size)
0074 {
0075     header->cmd = SVGA_CMD_ESCAPE;
0076     header->body.nsid = SVGA_ESCAPE_NSID_VMWARE;
0077     header->body.size = size;
0078 }
0079 
0080 static inline void fill_flush(struct vmw_escape_video_flush *cmd,
0081                   uint32_t stream_id)
0082 {
0083     fill_escape(&cmd->escape, sizeof(cmd->flush));
0084     cmd->flush.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_FLUSH;
0085     cmd->flush.streamId = stream_id;
0086 }
0087 
0088 /*
0089  * Send put command to hw.
0090  *
0091  * Returns
0092  * -ERESTARTSYS if interrupted by a signal.
0093  */
0094 static int vmw_overlay_send_put(struct vmw_private *dev_priv,
0095                 struct vmw_buffer_object *buf,
0096                 struct drm_vmw_control_stream_arg *arg,
0097                 bool interruptible)
0098 {
0099     struct vmw_escape_video_flush *flush;
0100     size_t fifo_size;
0101     bool have_so = (dev_priv->active_display_unit == vmw_du_screen_object);
0102     int i, num_items;
0103     SVGAGuestPtr ptr;
0104 
0105     struct {
0106         struct vmw_escape_header escape;
0107         struct {
0108             uint32_t cmdType;
0109             uint32_t streamId;
0110         } header;
0111     } *cmds;
0112     struct {
0113         uint32_t registerId;
0114         uint32_t value;
0115     } *items;
0116 
0117     /* defines are a index needs + 1 */
0118     if (have_so)
0119         num_items = SVGA_VIDEO_DST_SCREEN_ID + 1;
0120     else
0121         num_items = SVGA_VIDEO_PITCH_3 + 1;
0122 
0123     fifo_size = sizeof(*cmds) + sizeof(*flush) + sizeof(*items) * num_items;
0124 
0125     cmds = VMW_CMD_RESERVE(dev_priv, fifo_size);
0126     /* hardware has hung, can't do anything here */
0127     if (!cmds)
0128         return -ENOMEM;
0129 
0130     items = (typeof(items))&cmds[1];
0131     flush = (struct vmw_escape_video_flush *)&items[num_items];
0132 
0133     /* the size is header + number of items */
0134     fill_escape(&cmds->escape, sizeof(*items) * (num_items + 1));
0135 
0136     cmds->header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS;
0137     cmds->header.streamId = arg->stream_id;
0138 
0139     /* the IDs are neatly numbered */
0140     for (i = 0; i < num_items; i++)
0141         items[i].registerId = i;
0142 
0143     vmw_bo_get_guest_ptr(&buf->base, &ptr);
0144     ptr.offset += arg->offset;
0145 
0146     items[SVGA_VIDEO_ENABLED].value     = true;
0147     items[SVGA_VIDEO_FLAGS].value       = arg->flags;
0148     items[SVGA_VIDEO_DATA_OFFSET].value = ptr.offset;
0149     items[SVGA_VIDEO_FORMAT].value      = arg->format;
0150     items[SVGA_VIDEO_COLORKEY].value    = arg->color_key;
0151     items[SVGA_VIDEO_SIZE].value        = arg->size;
0152     items[SVGA_VIDEO_WIDTH].value       = arg->width;
0153     items[SVGA_VIDEO_HEIGHT].value      = arg->height;
0154     items[SVGA_VIDEO_SRC_X].value       = arg->src.x;
0155     items[SVGA_VIDEO_SRC_Y].value       = arg->src.y;
0156     items[SVGA_VIDEO_SRC_WIDTH].value   = arg->src.w;
0157     items[SVGA_VIDEO_SRC_HEIGHT].value  = arg->src.h;
0158     items[SVGA_VIDEO_DST_X].value       = arg->dst.x;
0159     items[SVGA_VIDEO_DST_Y].value       = arg->dst.y;
0160     items[SVGA_VIDEO_DST_WIDTH].value   = arg->dst.w;
0161     items[SVGA_VIDEO_DST_HEIGHT].value  = arg->dst.h;
0162     items[SVGA_VIDEO_PITCH_1].value     = arg->pitch[0];
0163     items[SVGA_VIDEO_PITCH_2].value     = arg->pitch[1];
0164     items[SVGA_VIDEO_PITCH_3].value     = arg->pitch[2];
0165     if (have_so) {
0166         items[SVGA_VIDEO_DATA_GMRID].value    = ptr.gmrId;
0167         items[SVGA_VIDEO_DST_SCREEN_ID].value = SVGA_ID_INVALID;
0168     }
0169 
0170     fill_flush(flush, arg->stream_id);
0171 
0172     vmw_cmd_commit(dev_priv, fifo_size);
0173 
0174     return 0;
0175 }
0176 
0177 /*
0178  * Send stop command to hw.
0179  *
0180  * Returns
0181  * -ERESTARTSYS if interrupted by a signal.
0182  */
0183 static int vmw_overlay_send_stop(struct vmw_private *dev_priv,
0184                  uint32_t stream_id,
0185                  bool interruptible)
0186 {
0187     struct {
0188         struct vmw_escape_header escape;
0189         SVGAEscapeVideoSetRegs body;
0190         struct vmw_escape_video_flush flush;
0191     } *cmds;
0192     int ret;
0193 
0194     for (;;) {
0195         cmds = VMW_CMD_RESERVE(dev_priv, sizeof(*cmds));
0196         if (cmds)
0197             break;
0198 
0199         ret = vmw_fallback_wait(dev_priv, false, true, 0,
0200                     interruptible, 3*HZ);
0201         if (interruptible && ret == -ERESTARTSYS)
0202             return ret;
0203         else
0204             BUG_ON(ret != 0);
0205     }
0206 
0207     fill_escape(&cmds->escape, sizeof(cmds->body));
0208     cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS;
0209     cmds->body.header.streamId = stream_id;
0210     cmds->body.items[0].registerId = SVGA_VIDEO_ENABLED;
0211     cmds->body.items[0].value = false;
0212     fill_flush(&cmds->flush, stream_id);
0213 
0214     vmw_cmd_commit(dev_priv, sizeof(*cmds));
0215 
0216     return 0;
0217 }
0218 
0219 /*
0220  * Move a buffer to vram or gmr if @pin is set, else unpin the buffer.
0221  *
0222  * With the introduction of screen objects buffers could now be
0223  * used with GMRs instead of being locked to vram.
0224  */
0225 static int vmw_overlay_move_buffer(struct vmw_private *dev_priv,
0226                    struct vmw_buffer_object *buf,
0227                    bool pin, bool inter)
0228 {
0229     if (!pin)
0230         return vmw_bo_unpin(dev_priv, buf, inter);
0231 
0232     if (dev_priv->active_display_unit == vmw_du_legacy)
0233         return vmw_bo_pin_in_vram(dev_priv, buf, inter);
0234 
0235     return vmw_bo_pin_in_vram_or_gmr(dev_priv, buf, inter);
0236 }
0237 
0238 /*
0239  * Stop or pause a stream.
0240  *
0241  * If the stream is paused the no evict flag is removed from the buffer
0242  * but left in vram. This allows for instance mode_set to evict it
0243  * should it need to.
0244  *
0245  * The caller must hold the overlay lock.
0246  *
0247  * @stream_id which stream to stop/pause.
0248  * @pause true to pause, false to stop completely.
0249  */
0250 static int vmw_overlay_stop(struct vmw_private *dev_priv,
0251                 uint32_t stream_id, bool pause,
0252                 bool interruptible)
0253 {
0254     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0255     struct vmw_stream *stream = &overlay->stream[stream_id];
0256     int ret;
0257 
0258     /* no buffer attached the stream is completely stopped */
0259     if (!stream->buf)
0260         return 0;
0261 
0262     /* If the stream is paused this is already done */
0263     if (!stream->paused) {
0264         ret = vmw_overlay_send_stop(dev_priv, stream_id,
0265                         interruptible);
0266         if (ret)
0267             return ret;
0268 
0269         /* We just remove the NO_EVICT flag so no -ENOMEM */
0270         ret = vmw_overlay_move_buffer(dev_priv, stream->buf, false,
0271                           interruptible);
0272         if (interruptible && ret == -ERESTARTSYS)
0273             return ret;
0274         else
0275             BUG_ON(ret != 0);
0276     }
0277 
0278     if (!pause) {
0279         vmw_bo_unreference(&stream->buf);
0280         stream->paused = false;
0281     } else {
0282         stream->paused = true;
0283     }
0284 
0285     return 0;
0286 }
0287 
0288 /*
0289  * Update a stream and send any put or stop fifo commands needed.
0290  *
0291  * The caller must hold the overlay lock.
0292  *
0293  * Returns
0294  * -ENOMEM if buffer doesn't fit in vram.
0295  * -ERESTARTSYS if interrupted.
0296  */
0297 static int vmw_overlay_update_stream(struct vmw_private *dev_priv,
0298                      struct vmw_buffer_object *buf,
0299                      struct drm_vmw_control_stream_arg *arg,
0300                      bool interruptible)
0301 {
0302     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0303     struct vmw_stream *stream = &overlay->stream[arg->stream_id];
0304     int ret = 0;
0305 
0306     if (!buf)
0307         return -EINVAL;
0308 
0309     DRM_DEBUG("   %s: old %p, new %p, %spaused\n", __func__,
0310           stream->buf, buf, stream->paused ? "" : "not ");
0311 
0312     if (stream->buf != buf) {
0313         ret = vmw_overlay_stop(dev_priv, arg->stream_id,
0314                        false, interruptible);
0315         if (ret)
0316             return ret;
0317     } else if (!stream->paused) {
0318         /* If the buffers match and not paused then just send
0319          * the put command, no need to do anything else.
0320          */
0321         ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible);
0322         if (ret == 0)
0323             stream->saved = *arg;
0324         else
0325             BUG_ON(!interruptible);
0326 
0327         return ret;
0328     }
0329 
0330     /* We don't start the old stream if we are interrupted.
0331      * Might return -ENOMEM if it can't fit the buffer in vram.
0332      */
0333     ret = vmw_overlay_move_buffer(dev_priv, buf, true, interruptible);
0334     if (ret)
0335         return ret;
0336 
0337     ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible);
0338     if (ret) {
0339         /* This one needs to happen no matter what. We only remove
0340          * the NO_EVICT flag so this is safe from -ENOMEM.
0341          */
0342         BUG_ON(vmw_overlay_move_buffer(dev_priv, buf, false, false)
0343                != 0);
0344         return ret;
0345     }
0346 
0347     if (stream->buf != buf)
0348         stream->buf = vmw_bo_reference(buf);
0349     stream->saved = *arg;
0350     /* stream is no longer stopped/paused */
0351     stream->paused = false;
0352 
0353     return 0;
0354 }
0355 
0356 /*
0357  * Try to resume all paused streams.
0358  *
0359  * Used by the kms code after moving a new scanout buffer to vram.
0360  *
0361  * Takes the overlay lock.
0362  */
0363 int vmw_overlay_resume_all(struct vmw_private *dev_priv)
0364 {
0365     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0366     int i, ret;
0367 
0368     if (!overlay)
0369         return 0;
0370 
0371     mutex_lock(&overlay->mutex);
0372 
0373     for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
0374         struct vmw_stream *stream = &overlay->stream[i];
0375         if (!stream->paused)
0376             continue;
0377 
0378         ret = vmw_overlay_update_stream(dev_priv, stream->buf,
0379                         &stream->saved, false);
0380         if (ret != 0)
0381             DRM_INFO("%s: *warning* failed to resume stream %i\n",
0382                  __func__, i);
0383     }
0384 
0385     mutex_unlock(&overlay->mutex);
0386 
0387     return 0;
0388 }
0389 
0390 /*
0391  * Pauses all active streams.
0392  *
0393  * Used by the kms code when moving a new scanout buffer to vram.
0394  *
0395  * Takes the overlay lock.
0396  */
0397 int vmw_overlay_pause_all(struct vmw_private *dev_priv)
0398 {
0399     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0400     int i, ret;
0401 
0402     if (!overlay)
0403         return 0;
0404 
0405     mutex_lock(&overlay->mutex);
0406 
0407     for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
0408         if (overlay->stream[i].paused)
0409             DRM_INFO("%s: *warning* stream %i already paused\n",
0410                  __func__, i);
0411         ret = vmw_overlay_stop(dev_priv, i, true, false);
0412         WARN_ON(ret != 0);
0413     }
0414 
0415     mutex_unlock(&overlay->mutex);
0416 
0417     return 0;
0418 }
0419 
0420 
0421 static bool vmw_overlay_available(const struct vmw_private *dev_priv)
0422 {
0423     return (dev_priv->overlay_priv != NULL &&
0424         ((vmw_fifo_caps(dev_priv) & VMW_OVERLAY_CAP_MASK) ==
0425          VMW_OVERLAY_CAP_MASK));
0426 }
0427 
0428 int vmw_overlay_ioctl(struct drm_device *dev, void *data,
0429               struct drm_file *file_priv)
0430 {
0431     struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
0432     struct vmw_private *dev_priv = vmw_priv(dev);
0433     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0434     struct drm_vmw_control_stream_arg *arg =
0435         (struct drm_vmw_control_stream_arg *)data;
0436     struct vmw_buffer_object *buf;
0437     struct vmw_resource *res;
0438     int ret;
0439 
0440     if (!vmw_overlay_available(dev_priv))
0441         return -ENOSYS;
0442 
0443     ret = vmw_user_stream_lookup(dev_priv, tfile, &arg->stream_id, &res);
0444     if (ret)
0445         return ret;
0446 
0447     mutex_lock(&overlay->mutex);
0448 
0449     if (!arg->enabled) {
0450         ret = vmw_overlay_stop(dev_priv, arg->stream_id, false, true);
0451         goto out_unlock;
0452     }
0453 
0454     ret = vmw_user_bo_lookup(file_priv, arg->handle, &buf);
0455     if (ret)
0456         goto out_unlock;
0457 
0458     ret = vmw_overlay_update_stream(dev_priv, buf, arg, true);
0459 
0460     vmw_bo_unreference(&buf);
0461 
0462 out_unlock:
0463     mutex_unlock(&overlay->mutex);
0464     vmw_resource_unreference(&res);
0465 
0466     return ret;
0467 }
0468 
0469 int vmw_overlay_num_overlays(struct vmw_private *dev_priv)
0470 {
0471     if (!vmw_overlay_available(dev_priv))
0472         return 0;
0473 
0474     return VMW_MAX_NUM_STREAMS;
0475 }
0476 
0477 int vmw_overlay_num_free_overlays(struct vmw_private *dev_priv)
0478 {
0479     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0480     int i, k;
0481 
0482     if (!vmw_overlay_available(dev_priv))
0483         return 0;
0484 
0485     mutex_lock(&overlay->mutex);
0486 
0487     for (i = 0, k = 0; i < VMW_MAX_NUM_STREAMS; i++)
0488         if (!overlay->stream[i].claimed)
0489             k++;
0490 
0491     mutex_unlock(&overlay->mutex);
0492 
0493     return k;
0494 }
0495 
0496 int vmw_overlay_claim(struct vmw_private *dev_priv, uint32_t *out)
0497 {
0498     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0499     int i;
0500 
0501     if (!overlay)
0502         return -ENOSYS;
0503 
0504     mutex_lock(&overlay->mutex);
0505 
0506     for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
0507 
0508         if (overlay->stream[i].claimed)
0509             continue;
0510 
0511         overlay->stream[i].claimed = true;
0512         *out = i;
0513         mutex_unlock(&overlay->mutex);
0514         return 0;
0515     }
0516 
0517     mutex_unlock(&overlay->mutex);
0518     return -ESRCH;
0519 }
0520 
0521 int vmw_overlay_unref(struct vmw_private *dev_priv, uint32_t stream_id)
0522 {
0523     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0524 
0525     BUG_ON(stream_id >= VMW_MAX_NUM_STREAMS);
0526 
0527     if (!overlay)
0528         return -ENOSYS;
0529 
0530     mutex_lock(&overlay->mutex);
0531 
0532     WARN_ON(!overlay->stream[stream_id].claimed);
0533     vmw_overlay_stop(dev_priv, stream_id, false, false);
0534     overlay->stream[stream_id].claimed = false;
0535 
0536     mutex_unlock(&overlay->mutex);
0537     return 0;
0538 }
0539 
0540 int vmw_overlay_init(struct vmw_private *dev_priv)
0541 {
0542     struct vmw_overlay *overlay;
0543     int i;
0544 
0545     if (dev_priv->overlay_priv)
0546         return -EINVAL;
0547 
0548     overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
0549     if (!overlay)
0550         return -ENOMEM;
0551 
0552     mutex_init(&overlay->mutex);
0553     for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
0554         overlay->stream[i].buf = NULL;
0555         overlay->stream[i].paused = false;
0556         overlay->stream[i].claimed = false;
0557     }
0558 
0559     dev_priv->overlay_priv = overlay;
0560 
0561     return 0;
0562 }
0563 
0564 int vmw_overlay_close(struct vmw_private *dev_priv)
0565 {
0566     struct vmw_overlay *overlay = dev_priv->overlay_priv;
0567     bool forgotten_buffer = false;
0568     int i;
0569 
0570     if (!overlay)
0571         return -ENOSYS;
0572 
0573     for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
0574         if (overlay->stream[i].buf) {
0575             forgotten_buffer = true;
0576             vmw_overlay_stop(dev_priv, i, false, false);
0577         }
0578     }
0579 
0580     WARN_ON(forgotten_buffer);
0581 
0582     dev_priv->overlay_priv = NULL;
0583     kfree(overlay);
0584 
0585     return 0;
0586 }
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